Method of rolling black plates or sheets.



No. ?67,731. PATENTED AUG. 16, 1904. G. W. BRAY. METHOD OF ROLLING BLACK PLATES OR SHEETS.

APPLIOATION PILED DEO. 4. 1903. NO HODBL. 2 SHEBTS-SHEET 1 WITNESSS INVENTOR -No. 767,?31. PATENTED AUG. 16, 1904.

" C. W. BRAY.

METHOD OF ROLLING BLACK PLATES OR SHEETS. APPLIOATION PILED DEO. 4, 1903. NO MODEL. 2 SEEETS-SHEET 2.

INVENTOR UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

CHARLES TV. BRAY, OF PITTSBURG, PENNS YLVANIA, ASSIGNOR TO AMERI- CAN TIN'PLATE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPO- RATION OF NEW JERSEY.

IVIETHOD OF ROLLlNG BLACK PLATES OR SHEETS.

SPECIFICATION forming part of Letters Patent No. 7673731, dated August 16, 1904.

Application filed December 4, 1903.

TO all whom, it may concrn:

Be it known that I, OHARLEs W. BRAY, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Method of Rolling Black Plates or Sheets, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal vertical section showing a heating-furnace and outlet arranged for carrying out my invention. Fig. 2 is a diagrammatic plan View showing a mill to which the heated plates pass from the furnace and Fig. 3 is a diagrammatic side elevation.

My invention relates to the 'rolling of black plates or sheets, and more particularly their rolling in piles.

The object of the invention is to make the sheets as nearly uniform in size and shape as possible in order to assist in the matching operation and to reduce the amount of scrap.

To that end the invention consists in heat- 2 5 ing the bars or blanks in piles of two or more in number, so that two or more of the rolled sheets will thus be heated to a substantially uniform eXtent and will elongate to approximate the same amount.

In the drawings, 2 represents a continuous heating-furnace through which the sheet-bars are pushed, the bars resting upon side leclges and being moved forward by water-cooled bars 3, which are raised and lowered and moved endwise in feeding the bars forwardly.

The bars enter through the opening 4: and are ejected by the portions 5 of the bars 3. Instead of heating these bars in a single row I pass them through the furnace in piles of two 4 or more in number. Thus I have shown the furnace as containing the plates in piles of three. As the bars 3 rise and move forward in feeding the piles forwardly the portions 5 Serial No. 183,(585. (No specimes.)

force out the front pile of plates, which pile slides down the outlet-chute 6 and drops upon the feed-rollers 7. The feed-rollers carry the plates sidewise to the entering feed-table 8 of the rolling-mill, which is shown as of tandem form. The plates are drawn apart on the feed-table and fed forwardly singly and successively through the successive sets of rolls 9, 10, ll, 12, and 13 and then pass into the matcher 14:. In this matcher the rolled sheets are squared up sidewise and endwise, and the pack is then fed forward through succeeding sets of rolls 15 and 16.

The advantages of my nvention result from heating the bars to be rolled in piles. This gives a substantially even heat to two or more of the plates, so that as they pass through the rolls they will elongate to approximate the same eXtent. As the rolled sheets or plates from these bars are matched up, they will match more evenly and with less waste than heretofore, where the sheet-bars were heated singly and separately. The shearing of the finished sheets will cut of less material than formerly, and the saving in scrap is found to be considerable.

The heating-furnaces, the mill employed, and the method of heating and rolling may be Varied Without departing from my invention.

I claiml. The method of rolling black plates or sheets, consisting in superimposing two or morebars to form a pile, moving the piles successively through a continuous heatingfurnace, separating the bars, rolling said bars separately and successively, and then forming the separately-rolled plates into a pack; substantally as described.

2. The method of rolling black plates or sheets, consisting in' superimposing bars to form a pile, feeding said pile through a continuous heating-chamber, separating the bars of the pile and rolling the bars separately and successvely by passing them through succes- I sive tandem passes then matching the plates I sive tandem passes, and then matching the thus rolled and then further rolling the plates'thus rolled; substantially as described. matched pack; substantially as described.

3. The method of rolling black plates or In testimony whereo' I have hereunto set sheets, consistng in supermposing bars tel my hand. form a pile, feedng said ple through a contnuous heatng-ehmnber, separating the bars tnessesz of the ple and rollng the bars separately and JOHN MILLER, suecessvely by passing them 'hrough succes- H. M. CORWIN.

OHARLES WV. BRAY. 

